I like playing Tera. It is free and has more or a live combat system. I enjoy it greatly. Plus being free you have nothing to lose right? ^-^
Tera is my favorite MMO out right now. By far the best combat in any mmo released to date and the graphics are several notches above anything I've seen in a MMO thus far.
Ive Enjoyed it enough that I have sub to the game and that takes a lot for me to do these days. Between Tera and Eve Online I don't have much time for anything else.... Ultima Online a few hours a week maybe.
As much hate as it gets, World of Warcraft is still at the top for a good reason. It's a really good game. Sure, it's combat feels a bit outdated compared to some other games, but I like it way more than say Tera's action focused combat. It has a free trial, so could check it out to see if you like it.